Research has shown that calves with failure of passive transfer (FPT) will develop their own antibodies faster than calves with normal passive transfer when they are exposed to infection or vaccination.

Vaccinate FPT calves earlierThat said, calves known to have FPT can be vaccinated as early as the first week of life.

“When calves are vaccinated in the presence of low to moderate levels of maternal antibody, they appear to respond best if they are given a booster dose two to four weeks after the first dose,” says Amelia Woolums, veterinarian at the University of Georgia. “This is true even if modified live viral vaccines are given to calves, which can sometimes induce adequate immunity after only a single dose in adult cows.”

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